Martin Luther was a 16th-century German monk and theologian whose protest against abuses in the Roman Catholic Church, particularly the sale of indulgences, sparked the Protestant Reformation. He is central to the Reformed tradition for his emphasis on justification by faith alone through Christ alone, which restored the gospel to the center of the church's life.
Martin Luther began his public challenge to the ecclesiastical abuses of his day on October 31, 1517, by posting the Ninety-Five Theses. His core concern was not merely the reform of church structure, but the restoration of the gospel, teaching that the entire life of a believer must be one of repentance and faith, rather than dependence on external penance or indulgences. As a fellow sinner who deeply understood his own flaws, he pointed all to the truth that, in Christ, we are more accepted and loved than we ever dared hope. He famously contended for the Solus Christus and Sola Fide, emphasizing that God remits guilt through Christ rather than through human works. As the Apostle Paul writes, Romans 8:29-30 (ASV), "For whom he foreknew, he also foreordained to be conformed to the image of his Son, that he might be the firstborn among many brethren: and whom he foreordained, them he also called: and whom he called, them he also justified: and whom he justified, them he also glorified." Luther's life reminds us that we are accepted solely because of what God has done for us, not what we do for Him.
Luther's legacy is foundational to the Reformed faith. His work in purifying the church from human traditions and ordinances is essential to our heritage, as reflected in the Formula of Concord, which honors his work as the instrument through which God purified the chief articles of our Christian religion. Luther insisted that the Word of God is the ultimate authority (Sola Scriptura). While theologians like Calvin later systematized the theology that flowed from these Reformation principles, as seen in the Institutes of the Christian Religion, all Reformed traditions trace their reliance on grace (Sola Gratia) back to the fire lit by Luther. He taught us that our obedience is not a way to gain acceptance, but the joyful result of being already accepted in Christ—the very core of the gospel.